Rotary pump



July 7, 1925 Y w. P. SCHIRMER ROTARY PUMP Filed Jan. 19, 1925 2 Sheets-Sheet 1 July 7, 19.25. 1,545,204

w. P. scHlRMER ROTARY PUMP Filed Jan. l19, 1925 2 sheets-sheet 2 959. f1 if /HMJM 35% @l Mum Patented July 7, 19:25.

UNITED. STATES WALD IP. SCHIRMER, 0F LAKEWOOD, OHIO.

ROTARY PUMP.

Application led January To all lwlw/ml 'it may concern.' l

Be it known that I, WALno P. SGHIRMER, a citizen of the United States, residing at Lakewood, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Rotary Pumps, of which the following is a -specification.

This invention relates to improvement The primary object is to provide a rotary pump whose capacity is unusually large and one wherein the structure permits of high speed operatiot. without affecting the functioning of the pump elements.

Another object is to provide a rotary pump wherein the flow of fiuid will be absolutely constant.

A further object is to construct a rotary pump including a fioating rotor having oppositely directed sets of relatively staggered or alined teeth, the spaces between. thev teeth opening `through the ends of the rotor.

A still further object is to provide a pump in which a toothed rotor is driven from an internal gear wheel and is mounted floatably on a spacing disk and supporting means carried by end closures.

Other objects will be in part obvious and in part pointed out hereinafter.

In order that the invention and its mode of operation may be readily understood by those skilled in the art, I have in the accompanying illustrative drawings and detailed description thereof pointed out the preferred and one modified embodiment of the same.

Figure 1 is a side elevation of the complete pump;

Figure 2 is a sectional view taken substantially on the line 2-2 of Fi'gure 1;

Figure 3 is a side elevation of the elements separated, the pump housing being left out;

Figure 4 is a view similar to Figure 3, portions in this instance being in section;

Figure 5 is an inner face view of an end closure;

Figure 6 is an elevation of a modified form of rotor, the inlet or outlet openings being shown; and

Figure'7 is a face view of the spacing disk. l

Heretofore in rotary pumps of the character forming the subject matter of 19, -192.5. serial No. 3,357.

this application the structure has been such as toprevent use of a multi-vaned rotor for effectively and constantly` forcing a fluid throu h a pipe system. With the structure il ustrated in the accompanying drawings and set out in the following specification wherein similar characters of reference designate' similar parts, the above faults are eliminated and I provide a rotary pump having a maximum capacity and. one which may be operated at a high speed without experiencing theresults common to the ordinary pump of this nature.

This pump comprises a pair of spaced head plates 'or closures 10 which .may be of any desired configuration and are adapted for rigid connection to a pump housing or casing 11 as shown in Figure 2, connection being effected by means of bolts or the like 12. While other designs of casings may be employed I, as shown in Figure 2, prefer the type wherein the inlet and exhaust ports or openings 13 and 14 respectively are horizontally alinede The head plates or closures 10 are provided with openings in their faces and with heads 15 designed to snugly fit within the circular casing 11 and to have the inner faces abut the rotatable elements which will be set forth hereinafter. A drive shaft 17 is mounted in the shaft openin'gs. As shown in Figures 4 and 5- y these shaft openings 16 are eccentrically arranged in the plates 10 for reasons which will be apparent. Enlarged portions or bosses 18 are carried by the head plates to provide a ysufiicient bearing surfaceY for the shaft 17. Formed upon the upper half of the heads 15 is a pair of alineable crescent shaped portions or supports 19 as shown in Figures 2, 3, and 5. These crescent shaped portions 19 may be integrally cast with the heads 15 as shown, or they may be in the form of extensions on a spacing, disk 2O with which they normally contact when the parts are assembled. Each head 15 has a portion of its periphery cut away as shown in Figures 3 and 4 .whereby to form ways or recesses 21 such as will permit of unusually eflicient operation of the pump as will be apparent from the following description.

Fixed to the shaft and spaced apart by meansof the spacing disk 20 is a pair of gear wheels 22 whose teeth fit into the spaces supported upon the spacing disk 20 and tol a greater ,or lesser degree upon the crescent shaped portions 19. `In a Vsense this rotor -lloats upon these supporting elements.

As previously stated the spacing disk 20 may havev the crescent portions integrally formed therewith but in this case l have shown them as being carried by the heads 15,

said disk being fixed against relative circumferential shifting throu h the arrangement of dowel pins 27 whlch set into the recesses formed in the crescent shaped portions 19. p

The longitudinally spaced gear wheels 22 have their teeth engageable with portions of the rotor, preferably the lower port1on as shown in F1 re 2. It; is clear that fluid entering'the inlet port 13 as shown in Figure 2, will be drawn into the spaces 23 between the `vanes 24 and squeezed into the up'- per portions of the pump casing a carried around and exhausted through the port 14. Arrangement of the ways or recesses 21 in the heads 15 permits entry of a lluid into the pump between the ends of the vanes 24 as wellv as between the peripheral portions thereof, with the result that the rotor may be driven at a high speed and still accommodate a large volume of fluid. As previously stated the staggered relation of the vanes 24 also eliminates fluctuation of the fluid flow such as is common in the average rotary pump.

Heretofore `to the bestof my knowledge the construction .of a satisfactory rotary ump of large capacity has been unsuccessful due to the difficulty in providing means for driving a rotor which would operate properly at any speed.` My construction provides for the accommodation of a capacity volume at any speed without the danger of fluid by-passing from one end of the rotor to the other, this being cared for through the arrangement of the spacing disk 20 as shown in Figure 4L This spacing disk serves as a stationary partition which divides the rotor into two compartments, each compartment mounting one of the driving gear wheels which is rotated with the drive shaft-17., i

In Figure 6 I show a modified form of rotor wherein the vanes are longitudinally alined. This figure al o discloses the. relationv between the o ing rotor and the -amano-1 ways or recesses 21 which permit fluid to enter between the ends of the vanes as well as at the periphery.

While I have not shown the many types of gears applicable it is clear that the helical arrangement of vanes on the rotor would be quite feasible and advantageous.

Obviously there -are certain minor changes in the details-of construction which may be resorted to and such of these changes as may fall within the scope of the'appended claims ,I consider within the spirit of my invention. I claimtj 1. 'A rotary'pump comprising a casing, a shaft, a pair of spaced gear wheelsfixed tothe shaft, a spacing disk between the gear wheels, a floating rotor arranged upon said disk and having vanes engageable with said gear wheels, and means for permitting inlet and ehaust of fluid.

2. rotary pump comprisin a casin ,'a shaft, a pair of spaced gear l(ivheels ligx'ed to the shaft, a spacingl disk between the gear wheels, a floating rotor arranged upony said disk and having vanes engageable with said gear wheels, and means for permitting inlet and exhaust of fluid at the periphery and ends of the rotor vanes.

3. A rotary pump comprising a casing, a shaft, a pair of. spaced gear wheels. fixed tothe shaft, a spacing disk mounted looselyand eccentrically on the shaft, a floating rotor` arranged on the disk and having vanes engageable with portions of the gear wheels, and means for permitting inlet and exhaust of fluid.

4. A rotary pump comprising a casing, a shaft extending through said casing, a spacing disk eccentrically and loosely arranged on the shaft within the casing, a rotor, sets of oppositely longitudinal] directed vanes on said rotor, gear wheels ed to the shaft within the rotor and driving the same, and eans forpermittinginlet and exhaust of 5. A rotary pum com risin a casin a shaft extending thrldugh slaid cagsing, a sgaeing disk eccentrically and loosely arranged on the shaft within the casing, a rotor, sets of oppositely longitudinall. directed vanes on said rotor, gear wheels means for permitting inlet and exhaust of uid between the ends of the vanes and through the peripheral ways.

6. A rotary pump comprising a casing liavmg side and end members, a drive shaft, gear wheels, a spacing disk eccentrically and loosely arranged on the shaft between said gear wheels, a rotor having a central portion ed to the shaft within the rotor and `driving the same, and.

mounted on the disk, two sets of oppositely I directed vanes on the central portion, said gear wheels being engageable with the vanes to transmit motion to the rotor, and means for permittinginlet` and exhaust of Huid.

7. A rotary pump comprising acasing having side and end members, a drive shaft, gear wheels, a spacing disk eccentrically and loosely arranged on the shaft between said gear wheels, a rotor havin a central ring portion mounted on the dis two sets of oppositely directed relatively staggered vanes on the central portion, said gear wheels being engageable with the vanes to transmit motion to the rotor, and means for permitting inlet and exhaust of fluid.

8. A rotary pump comprising a casing having side and end members, heads forined upon the inner faces of the end members and having inlet and exhaust ports 'formed radially therein, substantially crescent shaped portions extending inwardly from said heads, a shaft extending through the end members and eccentrically arranged therein, a spacing disk loosely and eccentrically arranged upon said shaft, a pair of driving gear wheels lixed to the shaft and arranged at 'opposite sides of the spacing disk, and a rotor arranged to float on said disk and crescent shaped portions and having vanes engageable with said driving gear wheels.

9. A rotary pump comprising a casing having side and end members, heads formed upon the inner faces of the end members and having inlet and exhaust ports formed radially therein, crescent shaped portions extending inwardly from said heads,a-shaft extending through the end members and eccentrically arranged therein, a spacing disk ed sets of circumferentially spaced vanes carried by said ring portion.

1l. In a rotary pump, a rotor comprising a central ring portion, and sets of oppositely directed relatively staggered vanes extending longitudinally from said ring portion.

12. In a rotary pump, a casing, having opposed inlet `and exhaust ports, a shaft, a spacing disk eccentrically arranged on the shaft, a gear wheel fixed to the shaft at each side of the disk, a stationary crescent shaped portion connectedl to each face of the disk, a rotor comprisin a ring `portion. arranged on the disk, an` oppositely directed vanes on the ring portion engageable with the gear wheels to transmit motion to the rotor.

In testimony whereof, I Aailix my signature.A

WALDO P. SCHIRMER. 

